This beta features a whole ocean of new features from the upcoming Update Aquatic! These features are work in progress and more are on the way but we wanted to take the opportunity to get early feedback from players. If you find any bugs, please report them on bugs.mojang.com and post all thoughts and suggestions to feedback.minecraft.net. Thanks for playing!

New Features:

Conduits can now be constructed underwater and give players the Conduit Power effect

Changes:

Slightly decreased the friction of Blue Ice

Fixes:

Fixed several crashes that occurred during gameplay

Bone Meal can no longer be used too quickly

Blocks can no longer be placed underwater without highlighting another block while sprint-swimming in Creative mode

Players can no longer breathe underwater by swimming into ice blocks

The breath meter will no longer decrease when the player is visually above water

The breath meter is no longer refilled after quitting and loading back into a world

Dolphins can no longer be fed fish immediately after they have already been fed

Fences can once again be placed on leaves and certain other blocks

Fixed water not rendering when swimming against the bottom of a block

Seagrass obtained by commands is now functional and stackable

Changes to a world's name when it is initially created from a template will now update properly after saving and quitting

All Buttons will now display properly in the hotbar and when placed in an Item Frame

The Lead attach point no longer appears in front of the player when swimming

Items will no longer get stuck in flowing water source blocks

Zombies that have transformed from Husks no longer have super speed on land

Movement speed will stay constant after turning while sprint-flying in Creative mode

Flying speed now stays constant while descending

Mobs once again no longer spawn on carpet

Baby animals will no longer take damage in boats

Fixed the Marker on Treasure Maps disappearing when another player quits and rejoins a world

Tridents can no longer be destroyed by explosions

Tridents thrown into Soul Sand now land properly and no longer prevent Loyalty from working

Tridents thrown underwater will no longer produce infinite bubbles

The 'Sign In' button will now disappear from the main menu after signing in

Using the '/spreadplayers' command will no longer set entities or players at y=255